348 AMERICAN SPIDERS AND THEIR SPINNINGWORK. 
Zilla. In point of fact, the Lineweaving habit seems to drop into the 
spinningwork of all the Orbweavers with more or less facility. Such a 
genus as Argiope is able to swing out 
from either side of its orb a snare 
which, considered separately, is entire- 
ly characteristic of the Lineweavers. 
(Chapter VI., Fig. 96.) It will proba- 
bly be sufficient in this connection to 
refer the reader to the figures and 
facts contained in Chapter VIII. (See 
Figs. 115 and 123.) 
An interesting illustration of this 
commingling of typical habits was 
once observed upon a bare, 
Coépera- dead branch of a bush. 
Le Within the branching limbs 
keeping. ® Labyrinth spider had es- 
Fic. 340. Cotiperative housekeeping between Epeira tablished her peculiar snare. 
labyrinthea and Linyphia communis. > 
The delicate orb swung 
at one side, and a maze of crossed lines containing the nest- 
ing tube was woven above the orb. Close by a female 
Linyphia communis had spun her snare, which consists of 
a bowl of loose sheeted spinningwork and a maze of reti- 
telarian lines hung above it. Now, it so happened that ¢4@ 
these two neighbors wrought their snares so py: 
close to each other that they really interblend- 
ed. The cross lines of Labyrinthea and the 
cross lines of Linyphia were so interwoven that Fic. 341. The tubular den of Epeira 
it was impossible for me to determine the rides Sgseiah A is ag 
boundary line between the two webs, or 
to say at what point the work of the one 
ended and the other began. (Fig. 340.) It 
was a case of codperative housekeeping, 
something like that which I have already 
illustrated in the case of two Labyrinth 
spiders (see Fig. 120, page 135), the differ- 
ence being that in this case the codpera- 
tion was between species of different tribes, 
instead of the same species. Nothing could 
better illustrate the community of habit, 
Fic, 442, The curled thread of WDictyna on its in the particular of spinning retitelarian 
supporting radiating lines. (After Emerton.) snares, than such a juxtaposition as this. 
We have already seen how the tube is used habitually by certain 
species of Orbweavers, as, for example, Epeira strix, Epeira triaranea, Laby- 
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